Door-knob.



H. S. LOGKWOOD.

DOOR KNOB; APPLICATION FILED 1mm 15, 1908.

I Patented. N0v.2,1909.

@513 alike-awa lvl mcooeoi UNITED STATES PATENT OFFICE.

HENRY S. LOCKWOOD, OF SOUTH NORWALK, CONNECTICUT.

DOOR-KNOB.

T all whom it may concern:

Be it known that I, HENRY S. LooKwooD, a citizen of the United States,residing at South Norwalk, county of Fairfield, State of Connecticut,have invented a new and useful Door-Knob, of which the following is aspecification.

This invention has for its object to provide a simple and inexpensivedoor knob, which shall be made entirely of metal and of few parts whichare inexpensive to produce, as the operations are all performedmechanically and the assembling or attach ment together of which isperformed mechanically.

Vith these and other objects in view I have devised the simple and noveldoor knob, of which the following description in connection with theaccompanying drawing is a specification, reference characters being usedto indicate the several parts.

Figure 1 is a longitudinal section of my novel knob complete; Fig. 2 anend elevation of the shank detached; Fig. 3 an elevation of thecorrugated washer detached; Fig. i an elevation of the inner washerdetached; Fig. 5 a section of the shell detached; and Fig. 6 is anelevation partly broken away, showing the washers assembled upon theshank and locked in place ready to receive the shell.

10 denotes the shank, 11 the corrugated washer, 12 the inner washer and13 the shell. The shank is provided with the usual longitudinal openingto receive a spindle, with a collar 15 and with a neck 16 on the innerside of the collar. The shank may be cast or may be formed complete fromsheet metal as preferred. Washer 11 is provided with a toothed,corrugated or serrated edge, as at 17, and with a central opening 18,which is made angular but is preferably rounded at the corners. lVasher12 is larger than washer 11 and is provided with a similar angularopening 19 preferably rounded at the corners. Both of these washers areconcealed in the completed knob and may be formed of low grade steeleven in the most expensive knobs. The shell is struck up from softsteel, brass or bronze to substantially the form shown in Fig. 5,leaving a central opening 141 which just permits washer 12 to be passedthrough. The inner face of collar 15 is made slightly concave, and thewashers are both made concavo-conveX to correspond.

Specification of Letters Patent.

Application filed June 15, 1908.

Patented Nov. 2, 1909.

Serial No. 438,495.

In assembling, serrated washer 11 is first passed over the neck intoengagement with the collar, then washer 12 is passed over the neck andinto engagement with washer 11, and then the neck is opened outward bymeans of a blow, as clearly shown in Figs. 1 and 6. The openings in thewashers are made just large enough at their shortest di ameters toreceive the neck freely, so that when the neck is opened outward aportion of the metal of the neck will pass into the rounded corners ofthe openings in the washers and will lock the washers rigidly to theshank and prevent the possibility of rotation of the washers on theshank. It will be noted (see Figs. 1 and 6) that collar 15 and washer 12are both of greater diameter than washer 11, so that a circular recess,which I have indicated by 20, is left between said parts. Vasher 12 isnow passed through the opening in the shell and the edge of the shell isclosed into recess 20 between washer 12 and the collar with suflicientforce to cause the teeth or serrations upon the edge of washer 11 to beforced into the metal of the shell at the edge of the opening, therebylocking the shell rigidly to the shank and making it impossible for theshell to be turned on the shank, washer 12 serving as a perfectly rigidsupport for the inner wall of the shell and keeping it securely inplace. The collar is then closed down firmly upon the outer side of theshell, so that a perfectly air-tight and moisture-tight joint is madebetween the shell and the shank.

Having thus described my invention I claim:

1. A knob comprising a shank having a collar and a neck, a washer ofless diameter than the collar and having an irregular shaped edge, andan inner washer of greater diameter than the said irregular washer, bothrigidly secured to the neck with the irregular washer between the innerWasher and said collar leaving a circular recess between the collar andthe inner washer around the irregular washer, and a shell having anopening, the edge around said opening 00- cupying said recess andengaging the said irregular washer.

2. A knob comprising a shankhaving a collar and a neck, a washer of lessdiameter than the collar and having a serrated edge and an angularopening with rounded corners, and an inner washer of greater diameterthan the serrated washer and having a similar opening, said washersbeing mounted on the neck, portions of the metal of the neck beingspread out and securing said washers in position, and a shell having anopening, the edge around said opening being located between the marginsof the collar and inner washer and engaging the edge of the serratedwasher.

3. The combination with a seamless wrought-metal knob-grip having aconcentric opening in its inner face, of a washerlike locking plateinserted in the said opening and having its edge formed with pointswhich are embedded in the edge of the gri and a shank rigidly'mounted inthe said loclE- 15 ing plate against rotary and longitudinal movement.

In testimony whereof I aflix my signature, in presence of two witnesses.

HENRY S. LOCKWOOD.

Witnesses:

OLIVER S. STANLEY, FREEMAN B. MINTON.

